Oregon Esthetician State Board

Which ingredient is commonly used to help soothe and reduce inflammation in the skin?

1. Glycolic acid

2. Tissue respiratory factor

3. Salicylic acid

4. Ascorbic acid

The correct answer is: Tissue respiratory factor

Tissue respiratory factor is recognized for its ability to soothe and reduce inflammation in the skin. This ingredient is derived from biological materials and is known to have an effect on cellular respiration, which can promote healing and regeneration within the skin cells. This makes it particularly beneficial for individuals who suffer from skin irritation, redness, or inflammation. While glycolic acid, salicylic acid, and ascorbic acid have their own benefits for skin health—such as exfoliation, acne treatment, and antioxidant properties—they are not primarily known for their soothing and anti-inflammatory effects. Glycolic acid is often used for its exfoliating properties, which can sometimes lead to irritation if not used properly, whereas salicylic acid helps to clear pores but can be drying. Ascorbic acid, or vitamin C, is primarily utilized for its antioxidant benefits and brightening effects. In contrast, tissue respiratory factor directly addresses inflammation, making it a key ingredient for soothing sensitive or inflamed skin.